/Engine/Plugins/Developer/Concert/ConcertSync/ConcertSyncClient/Source/ConcertSyncClient/Public/IConcertClientWorkspace.h
passing an invalid client id will return true if all resources are unlocked
true if all resources in ResourceNames are locked by ClientId
bool AreResourcesLockedBy ( [TArrayView](API\Runtime\Core\Containers\TArrayView)< const [FName](API\Runtime\Core\UObject\FName) > ResourceNames, const [FGuid](API\Runtime\Core\Misc\FGuid) & ClientId )